My crush suddenly ignores my text!?

I thought he likes me too. We were friends before I started crushing on him, and he's not a player whatsoever. He was really nice to me and kiss me on the lips every time we said goodbye. He blushed a lot around me. I thought he liked me. A few days ago he started to ignore my text... I don't know what is going on. He never ignore my text before. It showed that he "seen" it. Our college is HUGE I don't have classes with him it's impossible to find him in the college without arrange it with him first. What do I do now? What's going on? Why does he suddenly ignore my text?